Finding the Third Proportional to 988,200 and 2,157,111

Step by Step Solution

1. Step 1: Write the proportion equation
   988,200 : 2,157,111 = 2,157,111 : x
2. Step 2: Convert to fraction form
   988,200/2,157,111 = 2,157,111/x
3. Step 3: Cross multiply
   988,200x = 2,157,111 × 2,157,111
4. Step 4: Simplify right side
   988,200x = 4,653,127,866,321
5. Step 5: Solve for x
   x = 4,653,127,866,321/988,200
6. Step 6: Final answer
   x = 4,708,690.41